pray vs say one's prayers

pray

adv
  • Please; used to make a polite request 

verb
  • To wish or hope strongly for a particular outcome. 

  • To humbly beg a person for aid or their time. 

  • To direct words, thoughts, or one's attention to God or any higher being, for the sake of adoration, thanks, petition for help, etc. 

say one's prayers

How often have the words pray and say one's prayers occurred in a corpus of books? (source: Google Ngram Viewer )